Complete the following tasks to unlock the corresponding achievement. To view your achievements and stats in Steam, select "Community", then "My profile", then "View all my games", then the game and view stats.

Achievement	How to unlock
A New Rome	Demonstrate outstanding ability, and capture one hundred regions.
Accomplished Strategist	Complete the main campaign game on the easy difficulty setting.
Affairs of Honour	Use your duellists to kill twenty men on the "field of honour"
American Hero	Complete the Road to Independence campaigns freeing the American colonists from British rule!
Assassin!	Use your assassins to kill, in unlooked-for fashion, twenty men who hinder your plans.
Blooded	Demonstrate your sense of duty and honour: complete ten multi-player battles.
Bloody Madman	Carve a bloody path to victory: kill a hundred thousand enemies!
Command of the Ocean	As a commanding admiral, win ten multi-player naval battles.
Conqueror of All	Be hailed as a true conqueror: kill a million enemies!
Drumbeat to Victory	Draw the sword and march onwards: complete one quick battle.
Emperor of Europe	Subdue and hold all the provinces and regions in Europe at the same time.
Expansionist Power	Capture ten regions, anywhere in the world.
Founding Father	Take one region by conquest, somewhere in the world.
Grand Tactician	Win ten classic multi-player battles.
Into the Breach!	Attack! Attack! Attack! Win ten multi-player siege battles when commanding a besieging army.
l337 Guard	Achieve victory in ten multiplayer battles, cutting a bloody path to greatness through your enemies' plans.
Maharajah of the Indies	Have mastery over all the provinces and regions in India at the same time.
Marshal's Baton	Achieve victory in fifty multiplayer battles, dashing your enemies' hopes in pieces in the process!
Master of the Americas	Conquer or control all the provinces and regions in the Americas at the same time.
Observe Diplomatic Niceties	Use diplomatic threats to good effect by making gains from five separate negotiations.
Only Obeying Orders	Ensure that thirty missions, regardless of detail or type, are successfully brought to a conclusion.
Perfidious Beast	Use treachery to best effect by turning against at least five allied nations and attacking them.
Polymath	Have your natural philosophers and scientists research all the technologies available to your nation.
Raw Recruit	War sir, is a terrifying experience! Take part in a multiplayer battle.
Strategic Genius	Complete the main campaign game on the hard difficulty setting.
The "Chevaux de Frise"	Defend, sir, defend! Win ten multi-player siege battles when commanding the defenders of a fortress.
The Efforts of Others	Successfully steal five technologies researched by other nations.
Tyrant and Ogre	Bring terror to the hearts of men: kill half a million enemies!
Veteran Strategist	Complete the main campaign game on the medium difficulty setting.
Whiff of Grapeshot	Gain some experience of combat: complete one ranked battle.